1- WA1160 is discontinued.
2- Bulb pins spacing is different.
3- Excessive heat will melt switch base and lens.
However, if you find the bulb then #2 can be solved by bending pins and get along with #3 by running the light for short period of time.
Other option is trying Osram 64265, Osram 64275, Philips 5761 or WA1111
Good luck for your search.