Generate partnumber based on attribute selection

Hey Gurus',

I have created a part wizard having bought-out / inhouse , plate thickness, customer type, plate series as the attributes.

Now on selection of the above attributes, it should auto generate the partnumber with the last 5 digit as the running sequence.

for example, the attribute selection is as follows:

in-house (2), 5mm (50, international (3), 234, running sequence (6789)

so it should generate the partnumber as 2532346789.

Any ideas?