Ninspots

Recently installed 64 bit window 7 on my new i7 computer. Amazingly FAST. I use Autodesk REVIT 3D building modelling program. Rendering a highest quality model on my old core 2 duo would take nearly 1 hour. With the 64 bit OS on i7 with 3Gb ram and same graphics card, same rendering would take just over 1 minute!!!
PROBLEM! Cannot find 64 bit printer drivers for 2 of my 3 Canon printers. Driver ok for Canon ix5000 A3 printer but no driver for Canon i865 A4 printer or my old BJC 5500 A2 bubble jet printer which is essential for my work. Have obviously checked Canon website but could not locate what I need and Canon do not appear to have a help service. Might be there somewhere but couldn't find it. Without printer drivers the 64 bit system is useless.
Amazingly EVERYTHING ELSE WORKS on the 64 bit OS. Even some v old applications. I expected the opposite that drivers etc would be no problem since we're told the world is about to go 64 bit soon.
Has anyone out there had dealings or problems with printer drivers for 64 bit Windows? Any help appreciated coz I'd love to go 64 bit.
Computer Details:
Core i7 920 CPU on Gigabyte GA EX58 UD4P Motherboard. 3 x 1Gb Corsair 1600 xms RAM. 1Tb Seagate Barracuda SATA HDD. Using old Asus EN8600GTS graphcs card.
Antec Solo case. Using an old 450w PSU awaiting arrival of Antec 550W Truepower PSU (No Gaming). Purchased new copy of XP Home but currently experimenting with Windows 7 and will definitely upgrade to Windows 7 when its out.