Hi, this is my first thread on this beautiful forum, so sorry for my bad English

I'm an Italian Bass Player, I have a walkabout scout combo (1x12). In this period I'm using the head with others cabs, so I take off the head from the cabs and I'd like to put it into an hard case. The black hard case made by Mesa in Italy costs 560 Euros (!!!), too much IMHO, so I want to buy the rackmount kit. Unfortunately I don't find those rack ears in Italy and in European stores I know, can you help me showing me a link about an USA web store that sell the rackmount kit for Walkabout?
Another two question:
To assembly rack ears do I have to open the amps or can I mount them from the outside?
Do you think it will be sufficent to use a 2U rack cases or I need a 3U rack cases? I'm afraid about the colling of the head....
Thank you