Hi, would anyone know where i could purchase a internal seal for 30100-PDA-E02 distributor on my 1999 Accord 2.0 vtec, this distributor is now unavailable and my internal seal is leaking and oil is getting through to my dizy cap.

Wow!  that's going to be hard to source.

Alternatively, if you could get a sleeve to go on the shaft as the shaft may have wear in a specific spot and the seal cannot work effectively.
Even with a new seal you may need to sleeve the shaft