I stumbled onto these on Marketplace. I believe they are old Howatt bow presses. Lebanon, OR is not far from me.
Please delete if this post is not appropriate.
https://www.facebook.com/marketplace/item/1643956466155291/?ref=search&referral_code=null&referral_story_type=post&tracking=browse_serp%3A9ea1b04e-6074-4de5-9286-fc86b092a917 (https://www.facebook.com/marketplace/item/1643956466155291/?ref=search&referral_code=null&referral_story_type=post&tracking=browse_serp%3A9ea1b04e-6074-4de5-9286-fc86b092a917)
You can make your own for a lot less $$ you still need riser jigs lengths stack heights etc.