My rad has been away for modification too, for the top brackets and widening of the airbox cutout. So much for being a direct replacement...
The top hose is the only one that actually fits, it was the two bottom hoses I was having trouble with.
After consulting a couple of 'experts' I eventually bought some lengths of silicone hose, which I was assured could be formed into the bends I required without collapsing. Needless to say that was a load of crap and the tubes collapsed when bent!
After much umming and ahhing about sending the radiator away again to have the water outlets lengthened I eventually bought one 19mm and one 22mm diameter 60 degree angled silicone hoses with 100mm legs and one 80 x 22mm alloy joining pipe.
For the bottom cylinder hose all I had to do was shorten the legs of the 60 degree angled hoses to suit.
For the hose from the water pump I used a 60 degree angled hose with the alloy joining pipe with another short length of silicone hose to the radiator.

Simon, I did not know about your radiator, I just guessed!
Sorry, but I do not know what the advantages/disadvantages of 'Evans Power Cool' are either, although I did receive a brochure about it when I bought the silicone hose.