ITShopCart - check for duplicates for QERReuse and QERReuseUS

Hi,

when ordering standard products (roles, groups etc), there's customizer check if there are duplicates in shopping cart. For obvious reasons it doesn't check for duplicates when ordering Multirequest resources. Is there any way to enforce duplicate check for those? I don't want to use Identity Audit because users can order same resources multiple times - but not from one shopping cart.

I'm talking about WebDesigner version (9.0 LTS)

Cheers,

Jakub