Similar happened to the deck from an old off-brand I had. It was a 48" deck and costly to replace. I fabbed up a new one. Transferred all the 'stuff' from the old to the new and it's been in business now for almost 15 years. It.s not that difficult.
A flat plate (the spindles mount on that) with a portion cut to match the air 'horn'. Raise that piece up to match the old deck, weld in a triangular wedge to seal it off, weld a skirt all the way around, accounting for that raised horn area, transfer the parts from the old to the new, paint it right to look good, and start mowing. What's nice about making your own is being able to slightly up the gauge.
A flat plate (the spindles mount on that) with a portion cut to match the air 'horn'. Raise that piece up to match the old deck, weld in a triangular wedge to seal it off, weld a skirt all the way around, accounting for that raised horn area, transfer the parts from the old to the new, paint it right to look good, and start mowing. What's nice about making your own is being able to slightly up the gauge.
