XLR or RCA cables

A Great Northern Sound PASI unit by Steve Huntley would be ideal if you can find one. Takes RCA or XLR in and RCA or XLR out. I sold one on the Gon and have seen several others for sale over the years.
You could also run a want ad.

This is what you need

Jensen PI2rx Iso Max input transformer. They cost $200 from Jensen. Your RCA cable from the pre goes into the box and an xlr cable out from the box into your amp. The xlr should be short for best fidelity. Short being under 32 inches. The unit is passive so It does not plug in. It is exactly what you need and works like a charm.

I found no loss of fidelity at all. In fact my system sounded better with it as my amp is fully balanced and sounded better using the xlr input and true balanced signal from the Jensen. Amazing little input transformer.

Jensen makes great stuff.

To get all advantages of Ayre, you should use balanced preamp. In your case balanced or unbalanced doesn't matter.

The Jensen will give you the full benefit of balanced and that is why it is so wonderful. Many balanced preamps have the same technology right inside the preamp that the Jensen offers in this passive box.