Mower deck GT3100 Power Shaft 44" Mover

I saved a 3100 model from the scrap yard and brought in back to life, absolutely luv this mover, cuts almost like a professional unit. My question is, since they no longer make the 44" deck can I put a bigger deck on it, say 50" or larger?

https://www.cubcadet.com/equipment/...d=-1&logoCode=01&modelNumber=14&serialNumber=

scroll down page about 2/3 way for GT3100 manuals, page 34 has attachments, looks like 54" deck, operators manual model # 14A671010