Most major towns have a transmission rebuild supply store or two. If you have one close you could most likely get one from them cheap. They may not stock it, but should not have trouble getting it.
i have tried every salvage yard in the area,and most of the transmission shops,they gave me a price of about 15 -20 dollers but nobody had
one,seems like everyone in this area is scrapping everything they have sitting around because scrap prices are up, i am building a c4 with kevlar bands and need a stonger servo