I sold my 355 and just found some spare parts if anyone is interested:
I'll ship to the lower 48 for free...
New Z2664 Table Support Arm $40
New Marelon Full-Flow Seacock (Model 932146) - Flush Thru-Hull x Ball Valve x Hose Barb - OEM, 1-1/2" $100 (this appears to be an OEM only item, original owner must have purchasesd as a spare.
Cabinet Latch $20 (used but works, the knob has lost it's polish...)