zeroptzero

I was wondering if anyone has replaced their oil dipstick o-rings and come across a proper sizing for them ?. The o-rings aren't sold individually so you basically have to buy an entire dipstick from Honda which is a waste IMO. Are there different types of o-rings, the oem ones are a green colour and I assume they have to be highly resistant to oil and gas.

Thanks for reading, if anyone has any info on them please post up.