artificial insemination

I helped the vet and doc from a and m develope the extender for the semen . as long as the semen stays below freezing it should stays good. i don't know how much they send or whether it comes in straws or ample. they should send info on how use it. we were breeding females about 18 yrs ago we would breed them three times according to there temperature. we had good duck. had a male treeing walkers think we pulled him i can't remember he feel out of a tree broke hi back. can you tell me who to contact about semen selling. he was twice state champion of Texas and had two sons out of my female . i found a gyp that goes back to that cross .trying to buy here she is ten yrs old and i would like to find semen on her great grandpa. any information would help. god bless