Budget bull pup scope

Anyone know what the (opinions welcome) best cheapest side focus scope specifically for bullpup is? Couple years ago I came across a new to me brand of scope made by hammers for high powered springers for like $59 or $69 bucks that impressed me so that I ordered a second immediately, even though it was probably made in Bangladesh or China it was surprisingly decent and I still use today.
 
I have a utg leapers 34 color scope with side focus on my fx wildcat. Zoom on second focal plane is from 4-16x zoom and the picture quality is pretty great. Best thing about it is the quality for a good price of 125$. So yeah I'd suggest this scope! Side wheel is purchased separately for 12$. Oh yeah, this topic is probably best for the "general" section so post something like this there next time.
 
I don't think you will find a bull pup specific scope. Also you don't have to limit yourself to just "airgun" scopes. As long as a scope will focus down to ten yards or so you can use any scope on a PCP airgun. And some firearms scopes are rated safe for spring guns as well but you will have to check with the manufacturer to be sure. I have a Primary Arms 4-14x44 on my Marauder. Its for AR15 and 308 firearms. Its a excellent airgun scope. First focal plane mil/mil. Side focus down to ten yards. sells for $230.-$280 depending on version. I would highly recommend it! I know it's not as inexpensive as you were hoping but just an example of a firearm scope that works great on an air rifle. The side focus versions tend to be more expensive than front focus models.