Tony at Talon Tunes will be your best bet for parts. Parts are hard to get for the Taipans at this time. Utah Airguns was trying to stock parts last time I checked about 5 months ago but did not have any at that time. Some of us Taipan owners have made our own parts.
orings on line at oring store you can get like 25 of each for 20 bucks they very cheap ,
as for parts airgun haven and a few others sell barrels and a valve and transfer port , for like $35 bucks but yes I have small mini lathe and can keep my airguns working with it and oring store or orings and more , Just buy sizes for your gun as assortments will not work .and screws or springs and balls can be bought online or hardware stores , I have not found it like FX where you can buy every part for gun ,
OK as far as springs for $18 bucks on amazon you can get hundreds of compression springs , for detents valves , triggers They great for modding get a asst like this