I missed that post...
have you called Nopro, they've been pretty helpful in the past. I get parts for mine (a 3 year old 18KW with Isuzu) from South Fl. DDA in Ft Lauderdale... Norpro will be able to tell you who carries parts in your area.
Speaking of Norpro, I had a problem with the fuel pump last week after changing the racor. it simply would not reprime.. .not sure why. Since i was anchored and had to recharge the batteries, I inserted a spare Walbro between at the racor outlet to reprime the system. after the walbro ran for a few minutes, I removed it but still got no flow out of the genset fuel pump. I reinstalled the walbro and and the genset fired right up. the next day, i tried running the genset on its own pump and it run fine, pulling fuel thru the Walbro which wasn't running. odd... bottom line, no boat should be without a walbro on board, it's great to refill and reprime the DDs and also to reprime and as a back up on the genset!