Car chargers - yes.

Holsters... RIM made all of there holsters generic enough to fit all of the 71xx series except case for the 7100i which interfere with the antenna.

7105t:
4.7 x 2.3 x 0.7 inches /
11.9 x 5.8 x 1.9 cm (LxWxD)

7130e:
4.6” x 2.2” x 0.9” /
11.7 cm x 5.6 cm x 2.3 cm (LxWxD)

7100i:
4.7” x 2.3” x 0.9” /
11.9 cm x 5.9 cm x 2.3 cm (LxWxD)

7100g:
4.6 x 2.3 x 0.8 inches /
11.7 x 5.9 x 2.1 cm (LxWxD)