For the HF service there are a number of products available.
Coaxial HF traps designed for nominated frequencies (HFTP), provide operation for 2 or 3 frequency wire dipoles. For correct operation of a wire dipole a balun is required, model (BN30).
Helically wound mobile whip aerials are available in a single frequency. These are wound on solid fibreglass blanks with a LVR heat shrink covering. (HFH1FLW)