Welcome to the Kitz forum.
The answer to your query is yes. You would purchase two VDSL2 based services, one from each of those two CPs and then with your own equipment perform the load balancing.
Load balancing just requires two or more circuits and the relevant equipment at the EU's end of the circuits.
Line bonding requires two or more circuits, the co-operation of the CP, with equipment required at both ends (CP & EU) of all the involved circuits.