Denis,
your needs are pretty common.
Alas, they often boil down to assembling a "koshirae" which is an insult to a good sword.
Of course, there are also examples of properly made koshirae, where the tsuka, tsukamaki and saya are newly made to fit the sword, and where tsuba, f/k and menuki are old but carefully selected. The result will be pleasing only if you deal with experts and if you have a very good understanding of koshirae styles, plus a solid knowledeg of Japanese culture, legends, symbolism, etc. Of course, some sense of aesthetics is needed, too :-)