Dell N2024 routing

Hi,

I have a Dell N2024 with several VLANs

VLAN 2 . PCs and laptops . IP configured on switch 192.168.2.1/24 . Here I also connect my MPLS router (IP 192.168.2.254)

VLAN 3 : xDSL router: IP configured on switch 1.1.1.2/29

VLAN 4 : WiFi Guests: IP configured on switch 192.168.5.1/24

MPLS Router's IP (192.168.2.254) is the default gateway and all works fine for PC and devices on VLAN 2

I have this problem

xDSL router has only a public IP. No internal IP (xDSL Router IP is 1.1.1.1/29)

I need devices on VLAN 4 use the xDSL connection and not the MPLS.

N2024 do not support Virtual router (VRF) so question is: there is a way to do so or I need another layer 3 device (like a firewall) ?

Please let me know

regards