We are an active family of five looking for a Sprocker puppy. I was advised to use Champ but can find no reference to Sprockers, I assume this is because they are a cross rather than pedigree breed. Is this correct or am I missing something?

Yes this is correct, sprockers won't be listed on here I'm afraid.

You may find this cross on some of the gundog groups. Please do make sure the parents are fully health tested for conditions known in their breeds as well. Crossing doesn't mean no health issues as I'm sure you know.