It took me almost a year to track down a TMNT comic at my local shop, and it was pretty good. This issue was Part 3 of a story arc, so not a great jumping on point, but it was well written and had an awesome cover.
https://sirmarkussite.wordpress.com...urtles-78-invasion-of-the-triceratons-part-3/
https://sirmarkussite.wordpress.com...urtles-78-invasion-of-the-triceratons-part-3/