Welcome orion! 
If the deck mechanically is in decent shape have you considered buying only the steel shell?
I entered the part number for the shell I found on this diagram page 42 & 43:
http://data.manualslib.com/pdf/8/746/74548-husqvarna/yth150.pdf?299bb3abd0cb23672a92f1f11ce85818
into Sears Parts Direct and came up with this:
http://www.searspartsdirect.com/partsdirect/part-number/532162809/0071/917
Lot cheaper if your other parts are still usable to transfer over to it.
If the deck mechanically is in decent shape have you considered buying only the steel shell?
I entered the part number for the shell I found on this diagram page 42 & 43:
http://data.manualslib.com/pdf/8/746/74548-husqvarna/yth150.pdf?299bb3abd0cb23672a92f1f11ce85818
into Sears Parts Direct and came up with this:
http://www.searspartsdirect.com/partsdirect/part-number/532162809/0071/917
Lot cheaper if your other parts are still usable to transfer over to it.