If you are talking about MMD models in general, there's fifty bazillion of them.

If you are looking for sd gundam specific models, you still have several options to practice with:

*These people are awesome and made some sd gundam models from scratch!**

~One of my favorite sites. Whoever this is is still active and adding models (*just checked website* o_O OMG! They made a Ronin Warrior gundam! I was thinking about making a parody between Baku and Ryo's transformation sequence... *could rant for hours* [link]

~Dancing Haro balls by Mr. Taki (download link is in the video description) [link]

~Another one of my favorites are the models by Marionet. The original site where they were at closed down. I re-posted the ones that I felt the Read Me file said it was okay to redistribute but I'd still credit Marionet if you use them. Gundam and GM set - [link] Gouf set - [link] Dom set - [link] Zaku set (but unfortunately not the second Zaku set) - [link]


As far as the SDGF ones I've converted to MMD, there are a few of those for non-members.

Zako soldier - [link]
Nobusshi (good if you want to practice editing it with PMD Editor) - [link]
Gunperry - [link]
Rice ball set - [link]
SDG stage - [link]

Hope that helps!