Nope, not really anything else available new as a frame only for that money. I had similar thoughts and bought a sanderson soloist for £240 but usually they are closer to £300. You used to be able to get an on-one scandal with slotted dropouts for about £230, not sure if they are making slotty ones again.
Assuming you have already tried ss-ing with a chain tensioner and don't like it (plenty of people do get along just fine with them), perhaps you could get a forward components eccentric bottom bracket: it will cost you the difference between what you sell the HJ for and spend on a brand new frame, you know your frame fits you already, and it lets you go back to gears easily enough.