Hello,
Can you please point me to where you found the recommendation for Dell DA300 hub?
I do not know what specifications you need - based on the DA300 I assume that you need one VGA port. I pre-filtered the product search on our website for you to review products available with VGA port:
https://www.displaylink.com/products...um=1&vid_vga=1
You can adjust the filters to match your needs.
Please keep in mind that I cannot recommend just one product as we do not manufacture or sell any end products.
Best regards,
Katarzyna