spec unfortunately those won't work. The original LED are both the same color, and 4 pins allowed for series, parallel, or independent operation. The dual color LEDs you posted all are 3 pins variety that won't allow for series wiring.
The original LED is 2mm by 15mm. I have tried looking for single LEDs, most are 2x5 and would leave gap. I've found a few 2x6 but that would still leave 3mm gap
There are larger LED but they would be thicker than 2mm. Can I grab those larger LEDs and dremmel them thinner? Or does LED bulb need to be intact to work correctly?