I've noticed that myself. To me there is no finer looking compact than the PO-1 but it's been almost a year since I've seen one listed for sale. Up till the last few months, there were CZ75 compacts out there. Sellers try to tell you they are the same thing but there is one important difference if you want one for carry. The 75 compact is 4 oz, heavier! Love them as I do, even the PO-1 is close to 2 lbs. and for me (a bit wider at the waist, than the hips), that is still too much weight.
In order to keep my pants up, either I lose weight, or the gun does! Just bought an M&P Shield 9mm that weighs 19oz. unloaded. I'm actually beginning to feel comfortable with it. This is my first composite gun as well as my first hammerless. Right now they are on sale at Budsguns for about $260 after a $75 mail-in rebate. My range gun is a CZ75b, also in short supply right now. I love my CZ, but as I said... it's a bit heavy to carry. Took me a good month, shooting twice a week to get used to the trigger. IT's a great gun and a great trigger too but after mastering the CZ trigger, it feels unusual. Considering my love of CZ's, I'm taken with the M&P. It will never be as accurate as my CZ but keep in mind, unless you are hunting down a bad guy, your range will be 3-7 yds. At 65, I'm not going to be on the attack!
You do have an option. Clones! Check out Tristar guns on Budsgunshop.com. They have 3 versions of the 75 Compact designated as the 100 series. they have a C-100, P-100 and T-100, all available for $385 and under. They all have 5 star ratings, all built on the CZ75 Compact internal parts. One benefit they offer is that they are lighter than CZ's because of an alloy frame. No plastics used but check out the finishes. One has a Cerakote finish, but the others are reputed to be not as durable as the CZ finish. They are still up there in weight for a CC but much lighter than the 75 Compact. EAA also has some fine CZ clones but the pricing is pretty close to CZ's.