This is true of Collector Boosters as wellCollector Boosters are the best way to collect these variant rares and mythic rares in both traditional foil and non-foil, and they're the only place to collect extended-art cards
If you want to get a better version of this card , prepare to dig a bit deeper into your pockets
Among all of the scant 4 examples of this piece in PSA's census reporting, this is the sole piece at this unimprovable tier
When you need something doing you have to be prepared to pay the cost of doing it
Some other mana cards to look at might be Worn Powerstone and Ashling, Rekindled, who get out ahead of your commander to produce 2 mana for spellcasting purposes
In other words, shield counters are a high-risk, high-reward mechanic