W6LVP loops are receive only.
Are you just interested in the 20m band? Lots of amateur activity is on 40, 80, and even 160 right now due to the current solar cycle.
If you are talking about pirate radio, then you probably should be looking at 40m solutions if going for something off the shelf.
Anyway, there are many verticals available with elevated, loaded radials. Check Cushcraft, MFJ, etc. They can be a compromise on bandwidth and gain, especially on the lower bands due to reduced length and increased element loading, but some antenna is generally better than no antenna.
You might want to look at cobweb, hexbeam, and multi-band yagi antennas as well.