A single request with multiple blueprints, selected on the fly - Possible?

Hello all.

Is there some way where one can make a request that will consist of, say, x number of Catalog#1 (with m CPUs, ..) , y number of Catalog#2 (n CPUs, ...) and so on.

I was thinking of having a XAAS blueprint with the workflow taking input as array of custom properties. But how will the input form look like?

Thought I will ask here to see if there are any other ways to do this. Imagine a shopping cart, adding multiple counts of blueprints and then finally making an order

This is in VRA 7.x, BTW.

Thanks