is it possible somehow to put these in a 14x12 or into a national brood with a 14x12 on top later on in year,or wait till next year.
Deep frames will fit into a 14 x 12 (extra deep box)! Same width just a deeper box, and both National format. Simply arrange to fill the rest of the space under the deep frames and they will have no alternative to drawing further comb on the adjacent 14 x 12 ('extra deep' or 'jumbo') frames. Remove and replace the deeps as and when appropriate (may be later this year, could be next year).
If you simply put them into the 14 x 12 box, the bees will draw some wild comb rather than draw the foundation when needed. A waste of good comb building time and materials IMO, but sometimes have done it as the frames are going to be dumped anyway.
Attempting to fill a deep and a 14 x 12 at this time of the year would be folly. I have had some 14 x 12 bxes on as supers earlier (on the OSR) as a means of getting frames drawn quickly and evenly (jumbos are notoriously difficult to get drawn as perfectly as deeps and shallows).
To get the frames drawn evenly, at this time of the year (or any other, really) is best achieved with a dummy board or divider to keep the comb drawing flat. For the extra deeps, I might only give one new frame of foundation to be drawn at a time (usually two deep frames of foundation are added to a nuc, but these are obviously bigger than those by some 50%).
Hope this helps.
Regards, RAB