Hi Zoran,
You can try this also, you can find on Ebay …without tripod and for an effective length of nearly 5 m - between 7Mhz and 50Mhz, I give you the french link !
I am a fan of the maximum length for a vertical and not for stopgap 
Yes we are far from a quarter wave on 40m but still a little less far!
On Ebay it’s easy to find this antenna - sorry for no translation !
Ordered one for me and waiting ! Now with the propa grooving, for me it’s full of hope !
73, Éric