Hi folks, am new here so want to say hello. I've been browsing the forum occasionally since I've purchased my 2003 E250 in January and have found a wealth of information from the people here. Really thankful for yall and I'm hoping to forward a question since I can't find anything mentioned in these forums.

A week ago I went to the beach on a windy day, and sand got blown into the engine bay/blower motor. Ever since I've had sand being blown through my vents into my face, eyes, doghouse, etc. It's something I'd rather not have to repeat while I travel through particularly dusty parts of the country (the van is being converted at the moment). Other than dissembling/clearing the blower motor, I am looking for ways to DIY retrofit a cabin filter to prevent this. I have an acquaintance who insists there's retrofit kits for all the vans but he owns a 2014 Transit but I'm doubtful the E series has the same options, since I can't find anything anywhere mentioning this. Hoping somebody has experience or 2 cents to drop in. Thanks.