Model 4303 covers 430=450 and is 5/8L The center frequency is tunable. I would tweek it down a bit, depending on your needs. Which end of the band do you need to favor...
4305C is a colinear with 2dB more of gain. same coverage and tuning.
4305CN is a colinear closed coil with 2dB more of gain, same coverage and tuning.
These are all satisfactory for ham bands, and better than hacking up one not designed for ham use. I'm not sure how to interpret your statement about "no coil".
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