Where to get a western show halter for a large horse?

I saw one for sale in the horse classifieds on this forum I think....

https://greenrivertack.com/catalog/

I used to own an own son of invitation only out of a seattle slew mare. He was 18 hands and required a large halter. I had to have one made for him specially but your horse does not seem to be near as big as him so I would think that a kathys or a blue ribbon used show halter would be your best bet. Ebay may have that but I would look at ther actual sites too sometimes they have used ones that are traded in for descent prices.

The halter on the palamino horse is to small for him. The check straps are to short not allowing the halter to be adjusted correctly.