Vbulletin 3.0.7

Hello,
i'm running Vbulletin 3.0.7 and i did many changes to it. It's impossible for me to upgrade to 3.5 or 3.6.

Is there any way i can buy and install vbseo on vbulletin 3.0.7?

vBSEO can be installed on vBulletin version 3.0.x. It is fully compatible.

However, we recommend that you upgrade to 3.6, since vBSEO has some features that are included only for 3.5.x/3.6.x series vBulletin forums.

If you have installed many hacks and template edits, then your installation to vBulletin 3.6 may not be simple. However, if you compile a list of the changes you've made, I'm sure that you can get support with the upgrade at vbulletin.org. Many of our members here have experience doing the upgrade on highly modified forums and might be willing to give you some insights, tips, or assistance with the process.