PRSAs are different to other products insofar as the provider has to apply to the Pensions Authority for a new/separate pricing structure for each regular, single and transfer contribution contract. That process takes about six months.
They don't have the flexibility to price/win lump-sum business that would have on, say, an RAC. The additional costs to the provider are circa 0.10% more on a PRSA.
Maybe email a few more intermediaries in that space, laying out your stall in terms of the amount you want to invest (honestly, it would have to be in the hundreds of thousands range) the product you want and the fund/s you're interested in. Not saying that it's possible to get it lower but you should ask anyway.
You'll have no entry/exit charges so you can move it if you find something with a lower cost.
Gerard