express composite type literal as text

Hi,

I'm trying to use a composite type in a WHERE clause, as described here:

http://www.postgresql.org/docs/9.4/static/rowtypes.html

Just pasting in the examples I get:

CREATE TYPE complex AS (
r double precision,
i double precision
);

CREATE TYPE inventory_item AS (
name text,
supplier_id integer,
price numeric
);

CREATE TABLE on_hand (
item inventory_item,
count integer
);

INSERT INTO on_hand VALUES (ROW('fuzzy dice', 42, 1.99), 1000);

Now I want to query for that row, specifying the item in the WHERE clause.
I can't use the ROW() notation, because all values need to be represented
as text over a REST api. But I can't seem to get the text-based syntax to
work:

select * from on_hand where item='("fuzzy dice",42,1.99)';

yeilds

ERROR: input of anonymous composite types is not implemented

I've tried various forms of quote escaping and dollar quoting as the docs
suggest, but they all produce that same error:

select * from on_hand where item='(\\\"fuzzy dice\\\",42,1.99)';
select * from on_hand where item=$$("fuzzy dice",42,1.99)$$;

How do I express a composite type literal as text?

Thanks,
Eric