The Jensen speaker of which I speak and highly recommend is the P12N, finished green with a bell type cover, identical in looks to the Celestion Blue. I just checked the prices though, they are almost the same price as the blues @ £175.
The problem today with Celestion Blues is that their are British made ones, but there are Chinese copies too.
I can also recommend the Eminence 'Texas Heat' at £75 ish. I have one in my Mesa Boogie and get a great early Hank sound from that too.
The firm I look at first for speakers is 'Lean Business', then I check out 'Hot Rox' in Nottingham. If you are lucky you could find something on eBay at the right price.