PARALLETTES HERE http://www.incitefitness.co.uk/pullupbars/metal-paralettes
http://www.incitefitness.co.uk/pullupbars/ for fitness equipment
http://www.incitefitness.co.uk/pullupbarbuilds/ for bar builds
If you're new to muscle ups (or just need to clean them up), I find these bands help a lot. They give you a bit of spring to help with the pull up or muscle up.
Hope this helps and you can get the bands from http://rubberbanditz.com/