I had the same inlet on my 34. I just used a 3" hard pipe kit and a 3" to 4" samco pipe. Was tight but worked.
The o ring for can be made. Can bye O ring my the meter and just superglue it together.
If you need that can supply it just need to know the size of the grove it sits in.
The vac pipe bit is more tricky. Can the std one be cut down???
Well I have a trust intercooler that I have just fitted which is slightly larger than standard which I think has 3.5" end tanks but I managed to get standard piping on it with a bit of effort. I'll keep an eye out for some hard pipe kits.
Cheers, I will let you know about the o rings mate I'm still waiting for it to turn up! Should be here in the next few days.
Yeah you can cut them down but would be nice to have the proper part.