Herbie's Audio makes some nice TT mats if that's something you are looking for.
I'd like to hear some opinions here about the Herbie's.
I just got a turntable 5 wks ago (Technics SL1210 M5G); I hadn't owned a TT in nearly 25 years and have a lot of catching up to do. One thing I noticed is how--when the stylus is contacting the LP--it picks up any noise or vibration that comes up through the turntable stand. Therefore, anything that can decouple vibration from the stylus will be helpful.
My current rack is a disaster. It's welded tubular steel and has an obvious resonance around 100-150 Hz. I plan to replace it at least with a screw-together type with thick, heavy MDF shelves, and may get a wall-mount TT stand to decouple it from the floor altogether.
For the money, it's hard to beat Vibrapods for vibration control. I put Vibrapods under the Technics' feet and I'd say the stand resonance coming through the stylus dropped by at least 10 dB and maybe more.