hello, right now we only support the official implementation of zasilkovna provided in their github repository:
https://github.com/Zasilkovna/virtuemart3it is not possible to load remote javascript from within ajax context and thus the new implementation maybe quite complicated to do and would require from 10 to 20 hours of work.
furthermore loading javascripts from remote sites is a subject of privacy and security concerns since they can track your customers and orders even before your order is submitted.
we have a similar solution (coolrunner) which:
- displayes lists of branches from locally provided json file
- it shows google map with default GPS location of the customer viewing checkout
- it loads address from the GPS to address google data
and if zasilkovna can provide XML or JSON of their branches we could connect our existing plugin to this interface toghether with other branch-type shipping methods such as the ulozenka, postDK and else.
best regards, stan