Replace Text.Rage result with a value from another table

Hi

I filter a string out of a text with:

= try if Text.StartsWith([Product_Number], "P-") then Text.Range([Product_Number],11,2) else "NoService" otherwise "NoService"

that works fine solar and the result is e.g. A1, A2, A3, etc. I have another table that looks like:

A1 || Vendor1

A2 || Vendor2

etc.

How can I enhance above furmula to  do the lookup immediately, i.e. putting "Vendor1" or "Vendor" in the column instead of the Text.Range result?

thanks