1 choice...
If possible get same kind so mounting screws mate up.
2nd choice...
When OEM fan would go out on our work trucks, Cross reference any numbers below at local truck dealer...
The Red Dot All Purpose Fan 73R9082 - RD-5-10490-0P is designed to mount either horizontal (dash) or vertical (wall) surfaces. It features a fan diameter of 7-1/2", 12 volts and 2 speeds. It also has a chrome finish metal cage, two-wires with toggle and clockwise rotation.
PRODUCT SPECIFICATIONS:
Red Dot Part No.: 73R9082
Red Dot Factory Part No.: RD-5-10490-0P
Alliance Part No.: ABP N83 309015
Bergstrom Part No.: 756727, 756728
Freightliner Part No.: RDH RD5 10490 0
Mack Part No.: 4379-RD5104900
Navistar Part No.: 783966C93
Volvo Part No.: 3099733, RDHRD5104900P
Western Star Part No.: 3916157
Description: All Purpose Fan
Additional Description: Metal Cage, two-wire with toggle
Volts: 12V
Fan Diameter: 7 1/2"
Fan Overall Height: 8 3/4"
Overall Fan Depth: 5 3/8"
Rotation: CW
Speed: 2
SPDT Switch Function: Off-Low-High
Rating: 3.3 amps @ 13.6VDC
Finish: Chrome
2003 Majestic 23P... Northwest travel machine
2013 Arctic Fox 25W... Wife "doll house" for longer snowbird trips
2001 "The Mighty Dodge"... tow vehicle for "doll house"