ProTank2 base rings ?

[Fidothedog]

Hi there I have tried (and failed) to get along with the protank 3 and the aerotank but have discovered that if I put protank 2 bases in them then they work fine for me. Does anyone have a few protank 2 bases available ? Maybe you are now using aero-rings and don't need then anymore ?
Any help gratefully received.
Thanks


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