You could go with some 4 1/2 inch pullback risers without buying new lines. You would need to reshape the brake line a bit and lift the tank to pull out the slack on the electrical. I used to have them on mine with the stock bars and cables.

 

Hi, I'm in th UK too and wasn't keen on the mini apes. I got a 2nd hand set of deuce bars and risers which I like. In an ideal world I'd have liked straight risers but I got the stuff cheap and it works well. I had to change the brake line too but all the other cables are ok. I have a pair of used Fatboy bars if you're interested, I tried them but wasn't keen, you might like them though.

 

I tried several different bars year ago on my sporty and came to appreciate the comfort and handling of drag bars with properly fitted risers. This is what I have on my Dyna and one of the items on the bike when I bought it used. I have drags with the XL style riser. You can adjust the risers to better fit you. They are ugly and I don't have my wiring run into the bars; but I don't care, I have a runner not a looker.