Generate DB sequence in CPQ

We have a requirement to generate a unique ID for a class of products, this ID is selected from a predefined range and a checksum is concatenated at the end. To avoid duplicates this ID should be unique for each line item, cross-CPQ.

The Instance Id attribute for example is generated using the function getuuid(n) which generates an array of n 36-digit unique alphanumeric strings. Ideally we would need a similar function, that generates a unique 6-digit number. Is this kind of logic possible in CPQ, similar to a DB sequence?

Thanks, Nigel