RE: please help - antelope forms?
It may very well have been an altered form. Do what the one fellow said and take a photo of the mount you like to your taxidermist and he should be able to buy a form and alter it to the pose you want. Go to taxidermy.net and look under suppliers and check out the different companies and the forms they offer you might find something else you like. I know Joe Coombs offers several excellent and unique pronghorn forms.