Type-local and node-local nids?

I've searched around, but could not see this addressed anywhere. It's best explained with an example:

There is a content type Product with a type-local nid. Users write product reviews and there should be a counter local to each product (not the type but the node).

Say, you have these products:
'product/1'
'product/2'

And you have these reviews:
'product/1/review/1'
'product/1/review/2'
'product/1/review/3'
'product/2/review/1'
'product/2/review/2'

Could we somehow use/extend this module to achieve this? Or any other workarounds/approaches?