Yeah this design isnt going to be on general public release so pre ordering isnt an option sadly, it seems only a very lucky few will even be offered this design, I would like it myself but there is no guarentees I'll get one either. I liken this design to the Dennis Yip RMC's in that its more of a design intended for friends of Martin as apposed to a general release design, I guess that explains the lack of a retail price, because technically they are not for sale.
Its unlikely that those friends of Martin who do get a pair would be willing to sell them either so even buying them secondhand looks like a struggle, but it seems the most likely way you are going to obtain a pair realistically.
I believe there is a charity aspect to these jeans too although I dont know all the details, could be very much like the E bay Purple NB Hungry Dragons a few years back is my guess.
To be fair this isnt the first time such a friends design has been made by Martin, I understand that he produced a limited number design for his friends wedding a couple of years ago, needless to say I've never seen a pair anywhere for sale and have only ever seen one picture of the design too. It goes without saying that if I ever came across a pair for sale I'd snap em up whatever size they were, they are mega rare indeed and the fact they were never officially for sale makes them one of the rarest RMC designs you could ever collect. I suspect the World Cup RMC will attract a similar level of collectability gven only about 10 to 15 max pairs will be made.