Sorry to hear about your cracked racquet, had that RIP sensation many a time.
I would just suggest not to write off any brand of racquet as such. Wilson's will make good racquets and bad racquets, light and heavy- same as pretty much all the other brands. A good way to find a suitable racket similar to your own is to search it on tenniswarehouse. It has a racquet comparison tool which allows you to input your racquet specifications and compare them to current and previous racquets on the market.
Also £50 is very cheap so you might want to look at clearance sections in websites such as PWP, Pro-Direct Tennis, Tennisnuts and Tennis Planet to find a good price.