So what you need is an ISA VGA adaptor board for your 286. And yes, you can get one.
This is true, just make sure you get a card compatible with your ISA bus. An 8bit card will work in a 16 bit bus but not vice versa. Quick check... 8 bit bus is short 16 bit bus is about an inch longer and has a divider. Most 286's are 16bit but might want to check. Also don't spend more than a couple dollars on it. These parts are readily available and garbage to most so they are cheap. If you are having trouble PM me. I'm sure I have a few ISA VGA cards in a box around here somewhere.