Scubapro Balance chamber upgrade

[Decotek]

Looking for the part no. (if it exists) or a lead on where to purchase a balance chamber upgrade kit to suit an S360 / Tusa S90. Thanks in advance.

 

[Couv]

I'm not familiar with an upgrade kit, almost all SP balanced poppet designs use the same seat/poppet/spring/balance chamber. The balance chamber p/n is 11150102