Bring a small jumper pack. I love mine and it’s saved me countless times.
Finding a rectifier may be challenging. The aftermarket ones are not so good.
I found one on eBay but you should make a move quickly based on the price. It’s oem as well
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F223522113944
Arteck Car Jump Starter Auto Battery Charger and 8000mAh External Battery Charger Car Jumper for 12V Automotive, Motorcycle, Tractor, Boat, Phone with Clamps, LED Flashlight, 300A Peak 2.5L Gas Max https://www.amazon.com/dp/B01DVSSCG6/ref=cm_sw_r_cp_api_i_UMcqDb0QB1Q33