Yes, it can be done. Murata especially has a family of wire wound coils
size 1002 , unshielded, which are quite good at that. i designed
bandpass filters around 434 MHz with losses of about 1dB per dual
sections filters. point is that you can't calculate the coupling with
areasonable degree of accuracy, so you have to experiment with it. But,
once found, they are very repeatable. in this design the inductors were
22nH.
the long axes of the inductors are supposed to be parallel, since you
are interested in the magnetic coupling between them.
Saandy 4Z5KS