Need to find out where I can buy 1 1/8 diamond hole saw bit ?

[Acipenser]

You are right about the 3/4" bulk head hole size - I meant that the hole saw for that bulkhead is available at Rona so i could just buy that one and switch my plumbing to 3/4 . I just need to know if a 1 1/4 hole is too big or not. Another web site suggested using a 32mm or 1.25 bit so I am assuming I can use the 1 1/4 inch bit from Rona ($19.99). J&L's web site and packaging suggest a 1 1/8 hole !