4wheelparts are retards. I'd never let them touch my truck with a 10-ft. pole. That being said, the Superlift kit (SPUK-358 I believe) will fit your 05 the same as it fit my 01 and numerous other trucks from 01-07. The Ranger hasn't changed that much since then, primarily cosmetic changes
If you have any wrenching ability at all, the Superlift is not a difficult kit to install. Even if you don't have any experience, get a friend or two who know a bit about it and read the instructions through a few times and you ought to be able to pull it off. I'd do it myself again before I'd let the fools at 4WP do it.