ouch 29.95 https://www.flippers.com/catalog/product_info.php/coil-p-4002
This says "That KKN-332 crosses to C-7800-332 or G-33-2800."
https://pinside.com/pinball/forum/topic/help-bally-surfers-what-relay-goes-here#post-3527956
$12.99
https://www.marcospecialties.com/pinball-parts/G-33-2800