In reply to cacheson:
Often 'normal' crampons will fit 75mm NN quite well, for example Black Diamond toe bail works well and it isn't coming off that duck-bill! However, strap-on fronts usually give you huge amounts of front point, not what you want for a walking crampon. The best combo would be a BD wire toe bail with a strap on rear section. This is very unusual and I don't think anyone makes crampons this way [but I have a custom pair configured like this and it does work]
I have climbed Gd3 winter routes in leather tele boots, but realistically Gd2 is the limit. For walking they will take you anywhere you want to go.
Petzl do a tele toe bail, but it is over £20 if you can source them.
Cutting off the duck bill is possible. I have a pair of Garmont Excusions [plastic] tele boots that I've done this to. However, you are right that the steel insert supporting the 3 pins causes minor problems: the rubber wears very fast at the front after you have cut them down. A full resole is too expensive to contemplate: it may be possible to remove all the steel plate and do a partial resole just at the toe. Or, do as I do and just live with the toe section looking a mess.
That advantage of cutting is that any C1/2 crampon should work.
They will certainly offer a nice alternative to modern lightweight sweat boxes...............
TC