I just bought one of the shorter ones from Tractor Supply a few months ago. It was too wide to fit in the bracket, so an angle grinder was used in order to narrow it up a bit.
If you go to TractorSmart TractorSmart home page , you can enter the information for a BX2230, and then the BX23, and compare the parts lists. It'll take a day for them to email you the pdf links.