Speculation has linked Birmingham number one Ben Foster with a season-long loan switch to The Hawthorns and some reports have suggested that the deal could be imminent.
Appleton confirmed that Foster and West Ham shot-stopper Rob Green remain key targets for the Baggies and a goalkeeper should be one of two new arrivals to be confirmed "in the coming days or weeks".
"Hopefully they'll be one or two arrivals in the coming days or weeks but we've probably been hoping that for the last couple of weeks now," Appleton told Sportinglife.com after the 3-0 pre-season defeat at Rochdale.
"The longer it goes on it gets a little bit frustrating but hopefully we're at a stage where we're nearer rather than further away from getting one or two in.
"I'd like to think we're working hard to make that happen but ultimately there has to be agreement between the two clubs and if there isn't agreement between the two clubs we have to look elsewhere."
The adidas Nitrocharge is the most talked about new cleat in years. It was released on May 15 and will take your pitch by storm.
adidas has added some color to the Predator line with this new colorway. Released on May 17. Be the first to own a pair.
Ajax has released their away soccer jersey for the 2013/14 season. Get in the Gear.
The push for more color on their cleats, adidas has added the infrared colorway to the adiZero f50 Line.
The new PUMA evoSPEED 1.2 FG. A great new soccer cleat with classic look and first time for PUMA to be on the cleat.
Borussia Dortmund hears Wembley Calling and are headed to London for the Champions League final.
Bayern Munich are kings of Germany and hope to be crowned kings of Europe at Wembley later this month!
One of the top soccer cleats for control the Nike CTR360 will not let you down on the field in tight spaces.
Chelsea won the Europa League on Wednesday. The Blues defeated Benfica 2-1 on injury time goal from Ivanovic.
The Juventus jersey for the 2013/14 was released earlier this week. Be the first to wear the colors of the Old Lady.