Where to find this payment module download?

[semana]

Hello there, I'm VERY sorry if this is an obvious question, but I'm trying to find this payment module to download.  I've checked (what I thought) were the obvious;
- as one of the default modules in the vm installation
- extensions section
- forums (been looking for about an 30min)
- authorize.net public areas

I know I'll feel silly if this is obvious, but a link to the actual download would be really appreciated.

thanks,
Tony

[jenkinhill]

Authorize.net is already built in to VirtueMart. Payment method code AN on the Store / Payment Method List.