Just purchased an aftermarket undertail and install instructions I'm seeing say to cut the factory fender at the taillights to allow the aftermarket one to fit. Want to keep mine uncut incase I switch back. Let me know if you have a factory undertray. Would take one uncut or one that is already precut for an aftermarket undertail.
Pics attached of the undertail that was purchased and the parts that need cut off the factory undertail for reference.
You may have more luck if you say you are looking for a stock SP2 undertray (where the battery goes), cut or not. Uncut with the full original fender are rare as hens teeth used and pricey but they can be ordered new from Honda, and are a reasonable price from Speedzilla for example. Cut oem undertrays are very common, cheap and most any one cut will work with what you have.
Fellow members, there have to be a few hacked undertrays out there for this guy.
Thanks. I changed it to fender because that's what partzilla had it listed as. I'm definitely looking more for a cut one but haven't located one yet. If I don't find one soon I'll cut mine, since it's got some condition issues anyway, and I'll buy a new one from Honda as a backup.