has your solicitor written to him to request he sends them to you or drops them at a relatives/friends house? I would think writing to him would be the best way - you could put at the bottom if you dont hear from him you'll start court proceedings. Alternatively - would you be happy with a cash settlement in lieu of the items? you culd ask him for that instead (via letter/solicitor). Otherwise i would guess they/cash could be considered within the divorce settlement.
Lastly, you haven't had the things for a year: is any "thing" worth the hassle over?