I dont have anything to offer you in regards to your magazine issue.
Tactical tailor makes some P90 pouches for about $25 a piece.
If thats a little steep then there is this gentleman who makes custom P90 molle pouches in single, double and tripples. Starting at $19.95
If the above is still out of your price range than perhaps ebaybanneds items may work for you. Available in khaki and OD singles and doubles starting at $11.95