Thermocouple/InductivePickup for MM testing

[84 500SL Euro]

I have a Fluke 78 MultiMeter and want to get a thermocouple & inductive pickup for it AND to make sure they'll work with my cars [please see signature], as well as spend as little as possible, of course.

Suggestions as to where to get and how to use these items would be appreciated.

I know Fluke has such but am hoping less expensive attachments that are just as satisfactory is my goal, as well as hearing from those who've successfully deployed such rigs.

Appreciatively,

Courtney