Check out Weber VST speakers.

I have an old Ampeg VT-40 that started life as a 4x10 combo. When I bought it from Torres Engineering as a scratch'n'dent special, it was flood damaged to the point that only the amp chassis was usable. I priced out a lot of 10" speakers, but I soon concluded that four of any brand of speaker was going to cost me a serious pile of coin. Then I remembered what it was like when I played an old Garnet BTO into a pair of JBL 2x15 cabs.

I spent some time reading through the customer feedback on the Weber site. The comments on the Ceramic California 15" with the paper voice-coil dome led me to decide to buy one of those instead of getting four 10" speakers. I exchanged a few e-mails with Ted Weber himself along the way to making that choice. It's refreshing to have the president of a major equipment manufacturer reply to your questions.

As I said earlier, my VT-40 was badly flood-damaged, so I had to make a new cab for it anyway. I redesigned it as a 1x15 combo. I still haven't got around to applying the Tolex, or making a proper grill for it.

I'm in no hurry to finish it. It sounds so good that I don't want to take it apart again!

My first 'real' amp was a Traynor I borrowed from a buddy. They're great amps that deserve good speakers. Browse through the user comments on the Weber site. I'm sure you'll find what you need. And I can personally vouch for the quality of the product.