Amazon has the Automobile Interior LED Bulb 8-Pack for $11 - $3.31 off with coupon RXL5TGR5 = $7.69 with free shipping on $25+ or with Prime. List price: $30. Can be used for license plate lights, side door courtesylLights,interior map lights, dome lightscargo lights, each bulb has three 3030 chipset on it, compatible with T10, 147, 152, 158, 159, 161, 168, 175, 184, 192, 193, 194, 2825, and W5W lights.
Has excellent Amazon Reviews.
eBay has the Rand McNally Tire Pressure Monitoring System for $50 with free shipping. List price: $80. Features wide temperature range sensors, can measure temperatures from -40°F to 257°F., wide pressure range sensors, can measures pressure from 0 to 80 psi., includes four valve cap sensors and a rechargeable TPMS receiver.
Amazon has the Simdevanma LED Headlight Conversion Kit for H8, H9, or H11 Sockets for $40 - $15 off with coupon BAE6T8CT = $25 with free shipping. List price: $70. Features 3,800 lumens and 36-watts per bulb, can be works underwater.
Has good Amazon Reviews.