Ugh same. I had a 49g and a 49g+ in high school. The 49g broke down and the other got robbed when my student room got burgled a couple years later.

Learned a lot of RPN programming on those things!

I saw one in the wild a couple months back but had to say it didn't live up to my memories. Super slow and clunky interfaces compared to our modern touch screens.

db48x/db50x is probably your best bet