This is direct from the mint site.
American Eagle Silver Proof Coins
Production of United States Mint American Eagle Silver Proof and Uncirculated Coins has been temporarily suspended because of unprecedented demand for American Eagle Silver Bullion Coins. Currently, all available silver bullion blanks are being allocated to the American Eagle Silver Bullion Coin Program, as the United States Mint is required by Public Law 99-61 to produce these coins “in quantities sufficient to meet public demand . . . .â€
The United States Mint will resume the American Eagle Silver Proof and Uncirculated Coin Programs once sufficient inventories of silver bullion blanks can be acquired to meet market demand for all three American Eagle Silver Coin products.
In other words they have no idea when or if there will be a Proof eagle.
I am needing them also for my collection
madspec