P_O makes somewhat "authentic"/iNiS-style maps.
If you want to find and play them, try looking for AR 8 above ~4.3 stars. These maps will often be old-style and mapped with the low AR in mind, as maps had back then.
However, true 2008-accurate mapping might be considered low-quality and therefore be hard to rank with modern mapping standards in mind.
Some newer mappers make those maps as a result of playing/learning from older maps as a base.