I have a 48" HP with a s/n in the 200,000 range. I'm looking at having to replace the cutter assembly, and the part as called out in the parts list is 1-414335. I'm not having much success in finding that online, but there are several of the 103-1105 assemblys out there (parts manual indicates they are for s/n 260,000 - 351,999). Is it possible to substitute the 103-1105 assembly in my machine? Many thanks for your help.