1) You wont find the pqservice partition on any filehosting site or anywhere else online.
2) Are you sure, you dont have pqservice? Normally, acer computers launch recovery from that hidden partition if you tap ALT+F10 at boot. However, sometimes that may not work if D2D recovery is disabled in the bios. You can try enabling it, then retry. There are other options also such as using partedit32 to repair a damaged mbr, see this thread. Acer Aspire Hidden Partition Restoration - Wilders Security Forums
3) If your computer came with vista pre-installed, you can borrow a vista disk from a friend or download a clean copy off the web, then install the same edition that came preinstalled and activate using the key on the sticker at the back of the computer.
Alternatively, you can contact Acer and request for a set of recovery disks for your model, they'll probably ship it at a nominal cost.