Specialize drip tips for ZAP?

[Irishred]

Before I go any further in my fruitless attempts to buy more drip tips in hopes that at least one would fit the ZAP. I'm tired of buying tips that won't fit. Even w/o o-rings, they're too big.
Does anyone here got drip tips that actually fit the Z-Atty Pro w/o having to modify and where did you get them? There is this one guy I found who make DT for the ZAP but he's not taking new orders til he fill previous orders.

 

[Skyway]

I know my Bulli tip fits in the ZAP. So does a standard Acrylic baseline drip tip. I normally just use a Contoured 510 drip tip like what is listed on Avid's site. I got a smoktech stainless tip to put on the Zap since it is flat on the bottom expecting it to work well and it did not. It has a gap at the bottom of the tip and top of the Zap.