This thread was useful for rebuilding my 2Bs, so I will update it with a few things I learned.
New socks are available from Vandersteen for $48 each ($96/pair). They are available in black, charcoal, and beige colors. The new material seems nicer than the original; the socks also
seem more acoustically transparent than the originals, but that might have more to do with crusty old socks accumulating dust and whatnot.
The top inserts are available for $24 each/$48 for the pair. These are completely new frames with material already wrapped and stapled. My top inserts were impossible to remove completely in one piece. The replacement inserts are very nicely made and fit very well.
I DeOxit-ed the heck out of the rheostats for treble and midrange levels on both speakers. I could get two of them reasonably clean, but two still made a bit of noise and one had a point (at the recommended setting, of course) with a dead spot that would not go away. I got four new ones from Vandersteen for $40.
All of the prices included shipping. I ordered the socks and inserts at the same time. I do not know if I would have saved money on the replacement rheostats if I had ordered them with the fabric items. $40 seems just a teensy bit expensive until one realizes that shipping (UPS Ground) probably cost one-third of that amount.
I will note that Vandersteen cannot process payments other than by personal check, money order, or C.O.D. via UPS. I sent money orders from the local supermarket chain and the items were shipped the day Vandersteen got my money.
The only thing I will add to the process of removing the tops and bottoms is to use a stiff chisel-edged scraper,
not a screwdriver. Using a flat blade screwdriver as shown in the YouTube video caused unnecessary damage for me—probably because the wood on my speakers is old and brittle. Also because at least one corner will be stuck where a dowel is (intentionally?) seemingly glued on. A very stiff scraper with a metal handle end that can be hammered made removing the second speaker's plates much, much easier and resulted in negligible damage.
I needed to remove and re-do the caulking on the first speaker. Richard Vandersteen told me that he uses non-hardening butyl caulking for three sides and "household" silicone across the front. I got some butyl caulking intended for sealing gutters and general roofing.
The original butyl caulking across the sides and back are mostly visible as is the silicone strip across the front. I think these are intended to isolate the top and bottom pieces from the speaker frame to avoid vibration resonance issues. They also help to hold the top and bottom on to some extent, but the top dowels and bottom screws do most of the work.
I used Scotchbrite pads to remove stains and blemishes on the top and bottom plates. I then used linseed oil twice to treat the veneer. Nothing else.
These compare the old and new before I secured to top plate on the first speaker.
Once I figured out the first one, the second speaker took a fraction of the time to do. It was not a difficult task, but it was tedious—especially removing the staples. Funny thing about the staples, I thought I would use fewer but ended up using almost as many as original to ensure the socks stay consistently tight across all sides. There is a good reason for using so many.
I hope this helps anyone else considering restoring their older classic Vandersteens to give it a try.