Both of items you can buy only from players.
Dark Wizard's Crown as TibiaMisterios' fansite item has never been given to any player in any contest, of course except the creator. TibiaMisterios has made only two contests in it's career.
1) Fansite item contest,
2) Medieval Blazon contest, where first place was "tome of choice" in 2015.
In my opionion this fansite won't give any chance to win this item in the future, but in theory there is a possibility till TibiaMisterios is in the program.
Cateroide's Doll has some "dark past", haha. This fansite made a "Fansite item contest" in 2015, just after they have joined to the program. Rules were very controversial, because each player had to send graphics on fansite's mail and work of participants have never became public. As I remember after over the month proud admin announced the winners and few days later, after he got the item - left the program. To sum up: admin has done everyting to give contestants and observers feeling, that somethig is wrong with this contest.
After Cateroide left the program this doll became oficially unavaliable.
What is an interesting fact (but a little bit off-topic) is that after this situation rules in supported and promoted fansites program has changed. Nowadays before joining to the program fansite has to prove it's activity for a minimum of 6 months, CMs checks visit statistics, content usefulnes etc.
Source: my own experience xD