Alternative hop/barrel for a KWA Mk23 and a TM HJK45

[rodcarr1]

I love both these pistols, for the look and the handling. However, they both have rubbish hop units (albeit for different reasons). The KWA is just worn out - the gun is 10 years old and the hop collar is distorted. The TM has the plastic hop wheel, and the tinplate link to the top of the rubber - with any rubber other than the stock one, it won't exert enough force to depress the rubber enough, even with an I-Key.... So......2 questions...

Does anyone know if you can still buy the Maple Leaf EVO II hops for KWA gbbs?...and...
Is there a decent aftermarket hop unit for the TM HK45?

Thanks in advance..