"I think at the moment, electric cars are still somewhat niche and don't really appeal to the demographic who would be modding their cars."

I would disagree, there have been a lot of electric car hotrods and DIY innovation happening for years, like the White Zombie and others linked below:

http://news.discovery.com/autos/drive/worlds-fastest-electri...

http://www.greencarreports.com/news/1079928_fastest-electric...

http://jalopnik.com/the-electric-converted-1963-zelectric-vw...

More: http://www.diyelectriccar.com/forums/#/forumsite/20977

https://speakev.com