This reply is a little late but I just purchased a “enorossi” sickle mower for my Kubota BX2380. It is made in Italy and a little pricey but seems to be well made and works quite well. Mine has a 5’ bar and is manual lift so no rear hyd is needed. I purchased it thru my Kubota dealer.
I have small wheel weights and 2” spacers on my BX and it seems to work fine. The 5’ bar isn’t as heavy as a longer one would be and it works for what I need.