warning light senders
 

Does anyboby know an auto parts store equivalent to the low oil pressure and high water temperature senders from mercury?

Merc wants $52 for the high temp sender (87-806951) and $18.50 for the low oil pressure sender (87-8056051).

I know these have to be equivalent to something I can pick up for a fraction at Pep Boys or Napa.
I believe the temp sender switches at 195.
Thanks!
Dan