Motherboard upgrade for Shuttle XPC

A while ago I bought 2 Shuttle XPC SN41G2 systems; all been good up to recently.
Now I'm kind of wanting to upgrade a bit.

Does anyone know whether I can buy a newer motherboard for one of these that will fit in the chassis and therefore allow me to go with a later CPU?

Cheers for any advice or experiences.

they are usually quite expensive and your best bet is getting one off the bay

however, i really think you'd be better off just getting a newer one, yours is really dated but might serve as a great second pc for browsing and what not