I'm still following up in this. I think I've found a suitable hose, but I've read some stuff on silicone hoses needing special clamps. Did you reuse the OEM clamps?
I got mine from autosiliconehoses.com (£7.86 + £3.25 shipping):Silicone Polyester Reinforced Hose - 32mm - 45 Degree Elbows - 15 ColoursSKU: P SSE 045 032 KColourBlack
I purchased stainless jubilee/worm type hose clamps. I've had the radiator off a couple of times and the bottom one did start leaking so I had to replace it - so perhaps there is a problem?