PS2 v4 with Messiah

[mr_g_uk]

I think i've a ps2 v4 fitted with a neo 2.2 which is having problems booting DVD-R's. I've spoken to someone who can fit a new chip for me but they tell me that they don't do a messiah in a v4 as they tend to play up. Instead they will do me a flip top but I'm not too keen after reading other peoples comments. Does anybody else have a v4 with messiah or magic?

Also, does anybody know of anybody in the Blackpool/Lancashire area of UK who can do me a chip?