Tyre levers are a nightmare if you want to keep you're rim scratch free, even when using rim protectors they can get scuffed up!
plus they are a complete ball ache to use on larger sports tyres.
My tyre bar is a rough copy of one of these,
http://www.ebay.co.uk/itm/Sealey-Ty...924?pt=LH_DefaultDomain_3&hash=item487b2d9bf4
They have hard nylon ends which protect the rim from scratching and they do a really good job!
You can buy a kit here but you'd have to retro fit it to something, ok it you're handy at welding, or in my case handy with wood
http://www.ebay.co.uk/itm/manual-ty...948?pt=LH_DefaultDomain_3&hash=item27fd6c0364
You can buy blocks of nylon for a fraction of the price and to be honest I could have easily made the parts myself but I wanted a good pattern to go to. When my current ones ware out I'll have a go at making them myself.
As for the bead braker its just a cheap one from e-bay
http://www.ebay.co.uk/itm/Mechanics...718?pt=LH_DefaultDomain_3&hash=item20e57ecc16
but I've replaced the center rod with a bit of M18 stainless threaded rod which is much more sturdy when you're levering off of it.
The rest of just made up of bits of wood and nuts and bolts.
It works surprisingly well, on a good run I can have a tyre off and on in 10 mins and I'm not swearing at every thing like I would be if I were using tyre levers!
here's a video of how it works.
https://www.youtube.com/watch?v=Pkkd775BdVk