Do you have a windjammer to fit a WS 823 olympus hand held recorder ?
The best solution for your Olympus WS 823 would be:
Description: Olympus LS-3 Mini Windjammer
Order Code: 055404
Web link: www.rycote.com/products/055404
UK List Price: £25.00 exc. VAT each
The LS-3 has an almost identical width and depth.
Portable Recorder Audio Kits from Rycote on Vimeo.