I've heard of this company, they seem OK.
In your search for a vhf antenna be careful that you pick one that either doesn't need a ground plane (typically 1/2 wavelength antennas) or that you have an adequate ground plane, or you won't get the performance you are hoping for.
Those tall 5/8 wavelength antennas need a ground plane. Some manufacturers claim they have a ground plane 'included', whatever that means, whilst others warn you to provide a good ground plane.
On RIBs it can be difficult to provide a good ground plane, so be careful.