We have an 'other drugs' section that you can find here - there not broken down into ROA so you may have to check a few of the RC threads to see if anything catches your eye.
Please be careful with the blended RC (spice, scooby snax, etc) as these seem to have a variety of effects - some people have been ok when some have ended up in hospital. If you interested in the specific substance then please source that and dose accordingly.