[Ceri Jones]

I should have had a pint to think of this.... (spelling is just as bad without a pint)

For those with modern International fitting limb pockets the argument of custom limbs doesnt really arise that often due to every company having all the equipment needed to make them already set up so a custom and the order would be quick to make, but if you have an old standard bow like the marksman meteor then new limbs are diffucult to get hold of and would need to be custom built, meaning that machine's would need to be re-set up for a one off order possibly making it slow and expensive.
But then no 2 sets of marksman limbs are entirely same, as there limb tips have all been finished diffrently and im yet to see one with the same types of wood in its laminates, as a good discription of this my sisters marksman's limbs are very diffrent to mine and shoot diffrently as well despite only being a few lb's lighter.

But you also raise the question of BB needing a stiffer limb due to having no longrods and this is quite true, having used both training bow limbs and my own marksman limbs, the limbs on the marksman are a lot more stiffer than the training bow limbs despit being the same poundage and there is a notciable diffrence between the amount of tourque on release.
If a company created a set of limbs that were aimed specifically to archers that dont use stabs or shoot BB then the intrset might be there and as no other company seems to have addressed this issue of BB specific limbs there could be a wide market for them.