Magnet wire is available anywhere. Paper is just any low acid paper. Masking tape. I use a micrometer to measure wire diameter. The ARRL manuals from the 40's, 50's, 60's and 70's has all the information you need about wire gauge and how to wind transformers.
I know that you can get it many different places. I was asking from the
standpoint as to whether or not you had a preference.
The hardcore amatuer radio people wind their own transformers a lot. You can make a winder. I showed a picture at the beginning of my home made one. It works very well, in some ways better than the purchased units.
What youre doing looks real good. I was going to turn you on to a unit
someone was trying to sell for parts on ebay. But it looks like you have the
situation well under control :thmbsp: