Can some one guide me to the correct part numbers for a Starter motor please?

It is for the 1.7 turbo diesel Isuzu engine 1686cc.

I am looking at getting a replacement, as mine has an annoying fault. But wish to check as some of the Combo vans came with the same engine, and I wish to cross reference part numbers and make sure I get the best deal, as of course anyone does. Couldn't actually get to the starter motor on my car anyway, as it's right at the back in a hard to get to spot