Connecting with siblings from donor 5473

Fun_fam27

Hello fellow parents of babies from donor 5473. Just looking to connect with others as well as see if anyone has any available vials left for buy back. My wife and I currently have one son (Born on Christmas day 2019) and were looking to try and give him a sibling. We originally purchased 4 vials. I successfully used one to produce our son. My wife unfortunately wasn't able to conceive with 2 vials. We are down to our last vial and were hoping to purchase some more in the event GOD FORBID the 3rd IUI was unsuccessful. We are trying to appeal IVF denial coverage from our insurance but the likeliness of that being overturn is slim. Any help would be most definitely appreciated. Thanks in advance and God bless.