figure out what the style of bulb is i.e., bayonet. Then search ebay or similar for 12v led bulbs bayonet. You'll find lots of options. Make sure to choose an option that will fit in your enclosure and lumens that are close to what you have.
I used these in our 360 aft 1987. They are bayonet mount. What a difference in the lighting! So much better. https://www.amazon.com/Efoxcity-Bright-50-SMD-Signal-Interior/dp/B07G55QHHD?pd_rd_w=0NGGx&pf_rd_p=e0d46bc2-436f-4db3-a26e-323523040b19&pf_rd_r=HDGJKAVE68YBQGGGY4J3&pd_rd_r=34e2fbcf-cdb0-42a1-abf3-423948d67bf0&pd_rd_wg=XQsXC&pd_rd_i=B07G55QHHD&psc=1&ref_=pd_bap_m_rp_1_sc
