DEWALT DWV9220-XJ Dust Connection System - Woodworking Kit - ToolStore UK
2.5" Hose Adaptor for DeWalt DWE6423 125mm 280W Orbit Orbital Sander Dust UK | eBay
Shop Vac 1.25" Hose Adapter for Dewalt DWE6421 Orbital Sander (Replaces DWV9000) | eBay
$2 female to female hose end adapter allows you to use universal quick connects on the Dewalt Power Cleaner DCPW550B instead of the proprietary plastic ones that come in the box. :
SPARES2GO Power Tool/Sander Dust Extraction Hose Adaptor Compatible with DeWalt (26mm, 32mm, 35mm, 38mm, Pack of 2) : Amazon.co.uk: DIY & Tools
DWV9000 universal Quick Multi-Function Connector Fits DeWalt Dust Extractors,vacuum hose, various DW tools & shrouds. Allows fits easy, durable connection between 1-1/4 In. : Amazon.co.uk: DIY & Tools