Ampeg vt40 alternative and question about speakers

I’m a huge Queens of The Stone Age fan and I was looking into the vt40 combo and v2 head equivalent and I wondered what amps were similar too those but are easier to obtain. Since I really want to upgrade to a new amplifier but I feel a bit worried that an amp that old would be too unreliable and costly maintenance wise (especially considering it’s price). And as a follow up what speakers would be good for a mid range similar too the qotsa tone if I do end up replacing speakers in the future.

Thanks in advance!