Use the main "search" function (three items to the right of the "home" link) - it will search the entire forum.
I used "oil gauge" and do use the quote marks. This turned up a single page of hits, with some comments about leaks on the oil gauge.
If you decide to do the job yourself, which is doable, just a contortionist exercise - be very careful with the temperature gauge connection. That is a sealed system, gas filled, and if you knick or break it, $$$ will be spent to repair.