Pet Shed is an Australian company. In Australia and some US states no Rx prescription is required for Revolution therefore it is not a requirement on our site. However you may wish to contact your local regulatory body to make sure that it's legal for you to purchase Revolution without an Rx.
Try Advantage Multi, I have a hw+ female cat and have used it for the past 2 yrs. She had hw when I got her from a friend and this is what my vet suggested I use. It's worked great!
Thanks again for your question. We stock Generic Heartgard, but not Generic Heartgard Plus....yet. It has only recently become available and we will endeavour to get it on our site soon. Please keep checking back.